<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>
    <el-card>
      <el-alert
        title="添加商品信息"
        type="info"
        center
        show-icon
        :closable="false"
      >
      </el-alert>
      <el-steps :space="200" :active="activeIndex-0" finish-status="success" align-center>
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>
      <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px" label-position="top">
        <el-tabs v-model="activeIndex" :tab-position="tabPosition" :before-leave="beforeTabLeave" @tab-click="tabClicked">
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input v-model="addForm.goods_price" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model="addForm.goods_weight"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="addForm.goods_number" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品分类" prop="goods_cat">
              <el-cascader expand-trigger="hover" :options="cateList" v-model="addForm.goods_cat" :props="cateProps" @change="handleChange"></el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数" name="1">
            <el-form-item :label="item.attr_name" v-for="item in manyTableData" :key="item.attr_id">
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox :label="cb" v-for="(cb,i)  in item.attr_vals" :key="i" border></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <el-form-item v-for="item in onlyTableData" :key="item.attr_id" :label="item.attr_name">
              <el-input v-model="item.attr_value"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <el-upload
              :action="uploadUrl"
              :on-preview="handlePreview"
              :on-remove="handleRemove"
              list-type="picture"
              :headers="headerObj"
              :on-success="handleSuccess"
            >
              <el-button size="small" type="primary">点击上传</el-button>
<!--              <div slot="tip" class="el-upload__tip">只能上传jpg/png文件，且不超过500kb</div>-->
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
            <quill-editor v-model="addForm.goods_introduce"></quill-editor>
            <el-button type="primary" class="btnAdd" @click="add">添加商品</el-button>
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>
    <el-dialog
      title="提示"
      :visible.sync="previewVisible"
      width="50%">
      <img :src="previewPath" alt="" class="previewimg">
    </el-dialog>
  </div>
</template>

<script>
import _ from 'lodash'
export default {
  name: "add",
  data(){
    return{
      activeIndex:'0',
      tabPosition:'left',
      addForm:{
        goods_name:'',
        goods_price:0,
        goods_weight:0,
        goods_number:0,
        // 商品所属的分类
        goods_cat:[],
        pics:[],
        goods_introduce:'',
        attrs:[],
      },
      addFormRules:{
        goods_name:[
          {required:true,message:'请输入商品名称',trigger:'blur'}
        ],
        goods_price:[
          {required:true,message:'请输入商品价格',trigger:'blur'}
        ],
        goods_number:[
          {required:true,message:'请输入商品数量',trigger:'blur'}
        ],
        goods_cat:[
          {required:true,message:'请选择商品分类',trigger:'blur'}
        ]
      },
      cateList:[],
      cateProps:{
        label:'cat_name',
        value:'cat_id',
        children:'children',
      },
      manyTableData:[],//动态参数列表
      onlyTableData:[],//静态属性列表
      height:0,
      uploadUrl:'http://127.0.0.1:8888/api/private/v1/upload',
      //图片上传组件的请求头
      headerObj:{
        Authorization:window.sessionStorage.getItem('token')
      },
      previewPath:'',
      previewVisible:false,
    }
  },
  methods:{
    async getCateList(){
      const {data:res} = await this.$shop.get(`categories`)
      if(res.meta.status !==200){
        this.$message.error('获取分类列表失败')
      };
      this.cateList = res.data
      this.$message.success('获取分类列表成功')
    },
    // 级联选择器变化触发
    handleChange(){
      if(this.addForm.goods_cat.length!==3){
        this.addForm.goods_cat = [];
      }
    },
    beforeTabLeave(activeName,oldActiveName){
      if(oldActiveName==0&&this.addForm.goods_cat.length!==3){
        this.$message.error('请先选择商品分类')
        return false
      }
    },
    async tabClicked(){
      // 证明访问的动态参数面板
      if(this.activeIndex==="1"){
        const {data:res} = await this.$shop.get(`categories/${this.cateId}/attributes`,{
          params:{sel:'many'}
        })
        if(res.meta.status !==200){
          return this.$message.error('获取动态列表失败')
        }
      res.data.forEach(item=>{
        item.attr_vals = item.attr_vals.length===0?[]
        :item.attr_vals.split(' ')
      })
      this.manyTableData = res.data
      }else if(this.activeIndex==="2"){
        const {data:res} = await this.$shop.get(`categories/${this.cateId}/attributes`,{
          params:{sel:'only'}
        })
        if(res.meta.status !==200){
          return this.$message.error('获取静态属性失败')
        }
        res.data.forEach(item=>{
          item.attr_vals = item.attr_vals.length===0?[]
            :item.attr_vals.split(' ')
        })
        this.onlyTableData = res.data
      }
    },
    // 图片预览
    handlePreview(file){
      this.previewPath = file.response.data.url;
      this.previewVisible = true
    },
    // 处理移除图片
    handleRemove(file){
      const  filePath = file.response.data.tmp_path;
      const i = this.addForm.pics.findIndex(x=>x.pic === filePath)
      this.addForm.pics.splice(i,1)
    },
    handleSuccess(response){
        const picInfo = {pic:response.data.tmp_path};
        this.addForm.pics.push(picInfo);
    },
     add(){
      this.$refs.addFormRef.validate(async valid=>{
        if(!valid){
          return this.$message.error('请填写完整相关的信息')
        }
        //深拷贝一个form不去影响原来的数组
        const form = _.cloneDeep(this.addForm);
        form.goods_cat = form.goods_cat.join(',')
        this.manyTableData.forEach(item=>{
          const newInfo = {attr_id: item.attr_id,attr_value:item.attr_vals.join(' ')};
          this.addForm.attrs.push(newInfo)
        });
        this.onlyTableData.forEach(item=>{
          const newInfo = {
            attr_id:item.attr_id,
            attr_value: item.attr_vals
          }
          this.addForm.attrs.push(newInfo)
        });
        form.attrs= this.addForm.attrs
        const {data:res} = await this.$shop.post('goods',form)
        if(res.meta.status!==201){
          return this.$message.error('添加失败')
        }
        this.$message.success('添加成功');
        this.$router.push('/goods')
      })
    },
  },
  computed:{
    cateId() {
      if(this.addForm.goods_cat.length===3){
        return this.addForm.goods_cat[2]
      }
      return null
    }
  },
  created() {
    this.getCateList();
    // 获取屏幕高度
    this.height = document.documentElement.clientHeight-115+'px';
  },
  mounted() {
  },

}
</script>

<style scoped>
  .el-steps{
    margin: 15px 0;
  }
  .el-step__title{
    font-size: 13px;
  }
  .el-checkbox{
    margin: 0px 10px 0px 0px  !important;
  }
  .previewimg{
    width: 100%;
  }
  .btnAdd{
    margin-top: 15px;
  }
</style>
